I have to reapply base, my question is for the little dirt/dust, do you need to sand it all the way down or will scuffing remove it? I guess it depends on how deep it is right?

The 2nd question is now if I had spots that where taken down where the base coat was removed would you then paint on those spots first with maybe 2 coats then do the whole panel? Also, would there be any way to fix a spot without having to respray the whole panel, everytime I tried just reapplying base to a spot it does not look even with the rest of the panel (overspray?).

Thanks in advance!